Hey Rob!
Sorry for the delay on this. I do not ride Zipps so I reached out and got an answer. It boils out like this:
"At 150 lbs the wheels should be OK, although not designed for the rigors of cross. Obviously these would be reserved for buttery smooth courses and riding style will have to play into this...in other words, the smoother you are, the less likely for failure."
You should consider posting on some other forums and possibly reach out to Zipp themselves for guidance and other opinions. I would race them but that is strictly my opinion.
Good luck!
G
I just flatted my uber race only 303 rear during last weekends crit. I am thinking of retireing this wheelset (standard all Zipp road 303) to Cross and gluing up some Dugast's or something. I am a 150 pound rider. Misguided thinking or go for it..............Please discuss.
Cheers - Rob